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Finding the Fourth Proportional to 911,413.66, 1,257,857.72 and 549,020.47

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Solution

The fourth proportional to 911,413.66, 1,257,857.72 and 549,020.47 is: 757,712.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,413.66 : 1,257,857.72 = 549,020.47 : x
  2. Step 2: Convert to fraction form
    911,413.66/1,257,857.72 = 549,020.47/x
  3. Step 3: Cross multiply
    911,413.66x = 1,257,857.72 × 549,020.47
  4. Step 4: Simplify right side
    911,413.66x = 690,589,634,855.44
  5. Step 5: Solve for x
    x = 690,589,634,855.44/911,413.66
  6. Step 6: Final answer
    x = 757,712.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.